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SEC_ERROR_BAD_SIGNATURE

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I'm running version 58.0.2 (64 bit)

In the last couple of days I am unable to use Firefox. Every time I try to open a new web page I receive a SEC_ERROR_BAD_SIGNATURE.

I can't even get www.google.com to work! I get the same error. Pages that are saved in the browser before two days ago open fine. But anything new will not open I get the same error.

I get the error for pages I know are secure eg: Pinterest, Facebook etc

I'm running version 58.0.2 (64 bit) In the last couple of days I am unable to use Firefox. Every time I try to open a new web page I receive a SEC_ERROR_BAD_SIGNATURE. I can't even get www.google.com to work! I get the same error. Pages that are saved in the browser before two days ago open fine. But anything new will not open I get the same error. I get the error for pages I know are secure eg: Pinterest, Facebook etc

Additional System Details

Application

  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.146 Safari/537.36

More Information

FredMcD
  • Top 10 Contributor
4245 solutions 59390 answers
There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connections and send their own certificate. https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message https://support.mozilla.org/en-US/kb/connection-untrusted-error-message http://kb.mozillazine.org/Error_loading_websites https://www.bing.com/search?q=web+site+access+denied

Question owner

I don't have any of those on my pc.

I don't have any of those on my pc.
Shadow110 1072 solutions 14836 answers

Hi, Please : uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files and C:\Program Files(x86) Then restart system. Then run Windows Disk Cleanup. (Note: This should be Pinned and run Weekly, If never done below expect 10's of gig's) Then run it again and click the button that says Cleanup System Files. Note: your Firefox Profile is saved. But you should make a back up before you do :

Reinstall with Current Release Firefox 58.0.2 with a Full Version Installer

Please let us know if this solved your issue or if need further assistance.

Hi, Please : uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files and C:\Program Files(x86) Then restart system. Then run Windows Disk Cleanup. (Note: This should be Pinned and run Weekly, If never done below expect 10's of gig's) Then run it again and click the button that says Cleanup System Files. Note: your Firefox Profile is saved. But you should make a back up before you do : *https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles *https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer Reinstall with Current Release Firefox 58.0.2 with a Full Version Installer *https://www.mozilla.org/firefox/all/ Please let us know if this solved your issue or if need further assistance.